Merge pull request #778 from Portkey-AI/fix/sonnet-4-6-pricing

added claude sonnet 4-6 pricing

Author: Devansh0012

pricing/openrouter.json

@@ -4740,6 +4740,18 @@
       }
     }
   },
+  "anthropic/claude-sonnet-4-6": {
+    "pricing_config": {
+      "pay_as_you_go": {
+        "request_token": {
+          "price": 0.0003
+        },
+        "response_token": {
+          "price": 0.0015
+        }
+      }
+    }
+  },
   "qwen/qwen3.5-35b-a3b": {
     "pricing_config": {
       "pay_as_you_go": {